Panasonic FP2 ET-LAN Technical Manual page 167

LED operation in the system connection
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"RMT" LED display status is as shown below.
RMT LED Description
ON When any connection among System connections 1 to 3 is effective and no error occurs.
Flashing When an error occurs in any System connection (System connection 1, 2 or 3).
OFF When System connections 1 to 3 are not connected.
Reference: Chapter 2.1.2 "LED Operation Status"
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